Early FDI based on residuals design according to the analysis of models of faults: application to DAMADICS

Authors:
Yahia Kourd;Dimitri Lefebvre;Noureddine Guersi
Affiliations:
Department of Control Engineering, University of Mohamed Khider, Biskra, Algeria;Electrical Engineering and Automatic Control Research Group (GREAH), University of Le Havre, Le Havre, France;Department of Electronics, University of Badji Mokhtar, Annaba, Algeria
Venue:
Advances in Artificial Neural Systems
Year:
2011

Citing 11
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Abstract

The increased complexity of plants and the development of sophisticated control systems have encouraged the parallel development of efficient rapid fault detection and isolation (FDI) systems. FDI in industrial system has lately become of great significance. This paper proposes a new technique for short time fault detection and diagnosis in nonlinear dynamic systems with multi inputs and multi outputs. The main contribution of this paper is to develop a FDI schema according to reference models of fault-free and faulty behaviors designed with neural networks. Fault detection is obtained according to residuals that result from the comparison of measured signals with the outputs of the fault free reference model. Then, Euclidean distance from the outputs of models of faults to themeasurements leads to fault isolation. The advantage of this method is to provide not only early detection but also early diagnosis thanks to the parallel computation of the models of faults and to the proposed decision algorithm. The effectiveness of this approach is illustrated with simulations on DAMADICS benchmark.